Temporary autoboot is a maintenance feature that can be enabled regardless of your primary policy configuration, including environments already using TPM autoboot.
This feature temporarily bypasses TPM PCR validation and switches to a less secure, static on-disk key for authentication. Its primary purpose is to prevent PBA from being triggered during system maintenance, such as when rolling out a firmware or OS patch that you know will change TPM measurements.
This allows administrators to perform major updates without causing user disruption. For details on enabling and using this feature, see Enable or disable temporary automatic booting.